[轉] How do I trap CTRL-C in my Java app?

// The Shutdown class is a sample class to illustrate the
// use of the addShutdownHook method
class Shutdown {
  private Thread thread = null;
 
  public Shutdown() {
    thread = new Thread("Sample thread") {
      public void run() {
        while (true) {
          System.out.println("[Sample thread] Sample thread speaking...");
          try {
            Thread.currentThread().sleep(1000);
          } catch (InterruptedException ie) {
            break;
          }
        }
        System.out.println("[Sample thread] Stopped");
      }
    };
    thread.start();
  }

  public void stopThread() {
    thread.interrupt();
  }
}
 
 
// The ShutdownThread is the thread we pass to the
// addShutdownHook method
class ShutdownThread extends Thread {
  private Shutdown shutdown = null;
 
  public ShutdownThread(Shutdown shutdown) {
    super();
    this.shutdown = shutdown;
  }
  
  public void run() {
    System.out.println("[Shutdown thread] Shutting down");
    shutdown.stopThread();
    System.out.println("[Shutdown thread] Shutdown complete");
  }
}
 
 
// And finally a Main class which tests the two classes
// We let the sample thread run for 10 seconds and then
// force a Shutdown with System.exit(0). You may stop the
// program early by pressing CTRL-C.
public class Main {
  public static void main(String [] args) {
    Shutdown shutdown = new Shutdown();
    try {
      Runtime.getRuntime().addShutdownHook(new ShutdownThread(shutdown));
      System.out.println("[Main thread] Shutdown hook added");
    } catch (Throwable t) {
      // we get here when the program is run with java
      // version 1.2.2 or older
      System.out.println("[Main thread] Could not add Shutdown hook");
    }
 
    try {
      Thread.currentThread().sleep(10000);
    } catch (InterruptedException ie) {
    }
    System.exit(0);
  }
}

ref: http://www.esus.com/docs/GetQuestionPage.jsp?uid=392